Design and application of retention enema device / 中华危重病急救医学

Drug retention enema is a common therapy for various illnesses. However, it is impossible to keep the drug in the colon for a long time, due to the limitation of the current equipment, and it is unable to achieve the purpose of retention enema. A retention enema device was designed by the department of intensive care unit (ICU) of Dongfeng Hospital Affiliated to Hubei University of Medicine. The retention enema device adds a spindle shaped inflatable air bag on the basis of the traditional enema device, which not only fix on the anus, but also prevent the leakage of enema fluid. It can achieve retention enema, play the enema drug effect fully, and significantly reduce the nursing workload, in addition, the silica gel material of the retention enema device ensures the comfort of the patients, the decompression air bag also avoids the damage of the high pressure of the spindle fixed air bag for the patients, which is worthy of clinical use.

Design and application of retention enema device / 中华危重病急救医学

Drug retention enema is a common therapy for various illnesses. However, it is impossible to keep the drug in the colon for a long time, due to the limitation of the current equipment, and it is unable to achieve the purpose of retention enema. A retention enema device was designed by the department of intensive care unit (ICU) of Dongfeng Hospital Affiliated to Hubei University of Medicine. The retention enema device adds a spindle shaped inflatable air bag on the basis of the traditional enema device, which not only fix on the anus, but also prevent the leakage of enema fluid. It can achieve retention enema, play the enema drug effect fully, and significantly reduce the nursing workload, in addition, the silica gel material of the retention enema device ensures the comfort of the patients, the decompression air bag also avoids the damage of the high pressure of the spindle fixed air bag for the patients, which is worthy of clinical use.

DeBakey Ⅲ dissecting aneurysm treated by way of aortic isolation / 中国综合临床

Objective To study the technical skill and therapeutic effect of aortic isolation for treating DeBakey Ⅲ dissecting aneurysm.Methods Among 20 cases of DeBakey Ⅲ dissecting aneurysm,7 cases were with DeBakey Ⅲ a and 13 cases were with DeBakey Ⅲb.Imaging examinatin showed that among the 20 cases there were 5 cases with more than two tearings at difreret site.Covered stent was used to close left subclavian artery in 7 cases and distaI aortic isolation of left subclavian artery was conducted in other 13 cases.Restuls All cases were followed up for 3-40 months,finding that 19 cases survived but one case died because of pseudocoele bronchial fistula hemoptysis 18 months later.Conclusions Endovasular covered stent grafts is the simple,safe and effective way to treat dissecting aneurysm.

Toxicity to the normal hemocytes by ALA-PDT for the ex vivo purging of hematopoietic stem cell grafts / 药物分析学报

Objective To study the toxic effects of 5-amionlevulinic acid-based photodynamic therapy (ALA-PDT) on human peripheral blood mononuclear cells (PBMCs), cord blood mononuclear cells (CBMCs) and peripheral blood stem cells (PBSCs), and furthermore, to understand the possible causes of this response. Methods We used MTT assay to detect the survival rate of PBMCs, CBMCs and PBSCs after treated by ALA-PDT under the optimum experiment conditions with U937 as control;Annexin V-FITC/PI was used to detect the pattern of cell death induced by ALA-PDT. By using flow cytometry, we detected intracellular PpIX fluorescence intensity. Results After ALA-PDT treatment the survival rate of PBMCs had no significant change;however in PBSCs and CBMCs, the survival rate reduced to 70%, and the survival rate of leukemia cell U937 was the lowest, about 30%. After incubation with ALA,except for PBMCs, intraceUuiar PplX fluorescence intensity of the other two kinds of normal haemocytes and U937 increased obviously. These results combined with the flow cytometry suggested that the main pattern of cell death here was apoptosts. Conclusion Under the optimum experiment conditions, ALA-PDT has a slight effect on normal haemocytes but excellent depletions of leukemia cells. Therefore, it can effectively purify autologons bone marrow or stem cell grafts.

Alternative splicing of breast cancer associated gene BRCA1 from breast cancer cell line.

Breast cancer is the most common malignancy among women, and mutations in the BRCA1 gene produce increased susceptibility to these malignancies in certain families. In this study, the forward 1-13 exons of breast cancer associated gene BRCA1 were cloned from breast cancer cell line ZR-75-30 by RT-PCR method. Sequence analysis showed that nine BRCA1 splice forms were isolated and characterized, compared with wild-type BRCA1 gene, five splice forms of which were novel. These splice isoforms were produced from the molecular mechanism of 5' and 3' alternative splicing. All these splice forms deleting exon 11b and the locations of alternative splicing were focused on two parts:one was exons 2 and 3, and the other was exons 9 and 10. These splice forms accorded with GT-AG rule. Most these BRCA1 splice variants still kept the original reading frame. Western blot analysis indicated that some BRCA1 splice variants were expressed in ZR-75-30 cell line at the protein level. In addition, we confirmed the presence of these new transcripts of BRCA1 gene in MDA-MB-435S, K562, Hela, HLA, HIC, H9, Jurkat and human fetus samples by RT-PCR analysis. These results suggested that breast cancer associated gene BRCA1 may have unexpectedly a large number of splice variants. We hypothesized that alternative splicing of BRCA1 possibly plays a major role in the tumorigenesis of breast and/or ovarian cancer. Thus, the identification of cancer-specific splice forms will provide a novel source for the discovery of diagnostic or prognostic biomarkers and tumor antigens suitable as targets for therapeutic intervention.

An experimental study on destruction of K562 and HL60 induced by 5-aminolaevulinic acid-based photodynamic therapy / 生物医学工程学杂志

This experiment was designed to explore the pattern of K562 and HL60 leukemia cells death, the effects on their cell cycle and the cytoplasmic free calcium concentration ([Ca2+]i) induced by 5-aminolaevulinic acid-based photodynamic therapy (ALA-PDT). Under the transmission electron microscope (TEM), two kinds of leukemia cells' ultrastructure were observed. Flow cytometry combined with Annexin V-FITC/PI labeling was used to detect the pattern of K562 and HL60 cells' death induced by ALA-PDT. Flow cytometry combined with PI labeling was used to analyze the change in the cell cycle induced by ALA-PDT, and confocal laser scanning microscopy (CLSM) combining with calcium fluorescence probe was used to detect the change in the cytoplasmic free calcium concentration ([Ca2+]i). Immediately after irradiation, many typical apoptotic bodies were seen in the cells treated. Most of the cells treated were necrotic at 24 hours following irradiation. Flow cytometry analysis suggested that the main patterns of the cells' death were apoptosis immediately after irradiation and necrosis post-apoptosis at 24 hours post irradiation. Immediately and 24 hours after irradiation, the proportion of S phase of K562 was 57. 67% +/- 1.13% and 84.77% +/- 6.20% respectively, and the proportion of S phase of HL60 was 74.60% +/- 7.27% and 84.60% 1.74% respectively. Both [Ca+]i of the treated K562 and HL60 were increased obviously. In the best experiment condition, the initial pattern of the K562 and HL60 leukemia cells' death induced by PDT was apoptosis and the main pattern was necrosis post apoptosis. The two kinds of cells were arrested at S phase by ALA-PDT. During the death of the leukemia cells, the increase in intracellular free calcium concentration could be responsible for the ALA photodynamically induced damage to K562 and HL60 cells.